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December 19, 2014

December 19, 2014

Posted by **Henry P** on Sunday, May 27, 2012 at 4:35pm.

a) What is the diameter of the circle?

b) What is its circumference?

- Math -
**bobpursley**, Sunday, May 27, 2012 at 4:58pmarea= PI (4x-5)^2

but area= PI r^2

so r= 4x-5

diameter= 2*r

circumference= 2PI*r

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